From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0E5E7CCF9FE for ; Mon, 3 Nov 2025 14:41:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=yOIN4al8o3hvby2tYjmv7154iKKH2/FeWfWDeE8Z1b4=; b=HQu/VnEMB7y56yEmlSF/HbSanw /1YAjeJRQzKGC3wGA06KDdLFo0K6nunVGyCNO8ZvjfHnUodBkbKJRhddu0OEenfiPmJ2lDLgQAXPS 1Ry6APqdgctnzzkx+ubw1rJNBtfQPoaFMq6GOBsqj/cAVc95wBsRwcYTSibi2zWb5TA51rL7Lj4Uy LnaLymCLAuYwECkm8rzdrD38NPCRJoV8DgJKaCMtwNq74PMMJRfK7zeNZygksi7dsZNgnC5jQgclA Rceq0QpRbiBviYtfE3eEsQF6JNz36GkTpA2a8ATwdrjEBOzUyLGcWR+1lcd9aWb1Q9zsK45DtJ80s 4tR0jKxg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFvkA-0000000A2A7-2yZA; Mon, 03 Nov 2025 14:41:14 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vFvk4-0000000A29b-3NNH for linux-arm-kernel@lists.infradead.org; Mon, 03 Nov 2025 14:41:13 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 90856439B7; Mon, 3 Nov 2025 14:41:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D5CFC113D0; Mon, 3 Nov 2025 14:41:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762180867; bh=LjFjByiv2udyhbpyhBMDGQWMK+5W1S4rpccn8+FhmMU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=JDHYLNBZtzPaNXVho2kDaLiARfyfnqFPnf9nfQ6EhFuKJtSRiOUtDhjFgeY/WYmAn 2YcV9Ima4gdxz6cuzyeN28w4y8xpgk+5Ly7cWdY/OlR5ff6W4eurh8O+6DXGuBSCTW S2j+eMw/HHoN8UL7L718UMmeUmCy2S1K6SNGIqjFwGOUwxvFrVtIZFe8DJ2URkyBhZ Tb92uq2SfYTN5KbWc24raM66iJwD5mL5Ozm4oD0p0h/1rzNSg62ZSWCLuf2SZM+3FT 4Rf8uDV0VWwRxE0K2MzM9oTB1Qk0vatyWHOVZX3p8H2Pd1dWTH1NsaUfAqBYnjUKXv 7/Y3vSsYDIfPQ== Message-ID: <79a1f2dd-6752-426c-84c1-a38d300eb78c@kernel.org> Date: Mon, 3 Nov 2025 15:41:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/huge_memory: Initialise the tags of the huge zero folio To: Catalin Marinas , Mark Brown Cc: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org, Andrew Morton , Will Deacon , Aishwarya.TCV@arm.com References: <20251031170133.280742-1-catalin.marinas@arm.com> From: "David Hildenbrand (Red Hat)" Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251103_064108_871782_99A7C07B X-CRM114-Status: GOOD ( 10.18 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > > -----------8<--------------------------------------------- > diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c > index d816ff44faff..125dfa6c613b 100644 > --- a/arch/arm64/mm/fault.c > +++ b/arch/arm64/mm/fault.c > @@ -969,6 +969,16 @@ struct folio *vma_alloc_zeroed_movable_folio(struct vm_area_struct *vma, > > void tag_clear_highpage(struct page *page) > { > + /* > + * Check if MTE is supported and fall back to clear_highpage(). > + * get_huge_zero_folio() unconditionally passes __GFP_ZEROTAGS and > + * post_alloc_hook() will invoke tag_clear_highpage(). > + */ > + if (!system_supports_mte()) { > + clear_highpage(page); > + return; > + } > + LGTM! -- Cheers David